Method deprecated or moved

This method is deprecated or moved on the latest stable version.
The last existing version (v3.0.9) is shown here.

construct_id_map(records, primary_key=nil)private

Given a collection of Active Record
objects, constructs a Hash which maps the
objects’ IDs to the relevant objects. Returns a 2-tuple
(id_to_record_map, ids) where id_to_record_map is the Hash, and ids is an Array of record IDs.